docstr: Test init RetinaSepBN head.
docstr_tok: ["Test","init","RetinaSepBN","head","."]
code: def test_init(self):
      """Test init RetinaSepBN head."""
      anchor_head = RetinaSepBNHead(
          num_classes=1, num_ins=1, in_channels=1
      )
      anchor_head.init_weights()
      self.assertTrue(anchor_head.cls_convs)
      self.assertTrue(anchor_head.reg_convs)
      self.assertTrue(anchor_head.retina_cls)
      self.assertTrue(anchor_head.retina_reg)
  
file_path: mmdetection/tests/test_models/test_dense_heads/test_retina_sepBN_head.py
imports: from unittest import TestCase
  import torch
  from mmengine import Config
  from mmengine.structures import InstanceData
  from mmdet import *
  from mmdet.models.dense_heads import RetinaSepBNHead
label_desc: Use image node_id 1 for calling the TestRetinaSepBNHead obj's underlying member method code with example usage: obj.test_init() without return types